LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Big timing chain problem

Old 06-10-2009, 06:07 PM
  #1  
Launching!
Thread Starter
 
DarkKnightRider's Avatar
 
Join Date: May 2008
Location: So-Cal
Posts: 223
Likes: 0
Received 0 Likes on 0 Posts
Default Big timing chain problem

So I just had my motor rebuilt. Put in a new cam new pushrods lifters and springs. I was driving home last night and my timing chain snapped. WTF! Where can I get a new timing chain set and timing chain cover? Is there a stronger chain that I can put into the car without modding the motor? The one that snapped was a stock replacement from cloyes.
Old 06-10-2009, 06:12 PM
  #2  
TECH Senior Member
iTrader: (26)
 
kinglt-1's Avatar
 
Join Date: Jul 2005
Location: Ft. Wayne, IN
Posts: 5,794
Received 196 Likes on 138 Posts

Default

The stock unit normally is fine, most inspect the chain and gear for wear during a cam swap. Most likely it was worn.
Old 06-10-2009, 06:13 PM
  #3  
Teching In
 
c4ls7's Avatar
 
Join Date: Jan 2009
Posts: 7
Likes: 0
Received 0 Likes on 0 Posts
Default

I'm sure someone on here has a Timing cover for sale my guess is the cam you put in has a snout for a Opti II set up so heres probably the best bang for the buck http://summitracing.com/parts/LUN-93094/?image=large better and cheaper then the GM performance one I'm sure if you search around you may find that one for cheaper but no promises
Old 06-10-2009, 06:38 PM
  #4  
Village Troll
iTrader: (2)
 
SS RRR's Avatar
 
Join Date: Oct 2002
Location: Jackstandican
Posts: 11,003
Received 517 Likes on 373 Posts

Default

You need to find out if you did any damage to your valves and pistons. If there is damage it can burn your valves and pistons up costing you far more. The LT1 is an interference engine.
You should do a thorough investigation as to why your chain broke.
Old 06-10-2009, 06:54 PM
  #5  
TECH Veteran
 
shbox's Avatar
 
Join Date: Dec 2008
Location: Little Rock, AR
Posts: 4,116
Received 50 Likes on 44 Posts

Default

Originally Posted by SS RRR
You need to find out if you did any damage to your valves and pistons. If there is damage it can burn your valves and pistons up costing you far more. The LT1 is an interference engine.
You should do a thorough investigation as to why your chain broke.
Yup, there very well may be other damage.
Old 06-10-2009, 07:17 PM
  #6  
TECH Fanatic
iTrader: (1)
 
litch2004's Avatar
 
Join Date: May 2007
Location: Austin
Posts: 1,782
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by c4ls7
I'm sure someone on here has a Timing cover for sale my guess is the cam you put in has a snout for a Opti II set up so heres probably the best bang for the buck http://summitracing.com/parts/LUN-93094/?image=large better and cheaper then the GM performance one I'm sure if you search around you may find that one for cheaper but no promises
thats kinda funny though that the picture that is shown is a GM product. Shows the GM stamp and part number on it.
Old 06-10-2009, 07:27 PM
  #7  
TECH Senior Member
iTrader: (36)
 
ss.slp.ls1's Avatar
 
Join Date: Jan 2008
Location: Orange County, CA
Posts: 8,188
Received 26 Likes on 24 Posts

Default

Agreed with posters above, thoroughly check everything. You don't want to put you damaged motor back together for the second time, only to have to tear it down and fix it for a third time...

It wouldn't hurt to get a Cloyes double roller. But you will have to delete your relctor ring and tune out the cps code. You also have to run an EWP to use the double roller. Not to forget you have to clearance the inside of your new timing cover a little. Since you need a new one, it would be best to get a '95 cover that does not have the hole for the CPS sensor.
Old 06-10-2009, 10:38 PM
  #8  
Launching!
Thread Starter
 
DarkKnightRider's Avatar
 
Join Date: May 2008
Location: So-Cal
Posts: 223
Likes: 0
Received 0 Likes on 0 Posts
Default

Thanks guys. It's a big help.
Old 06-11-2009, 02:27 AM
  #9  
10 Second Club
iTrader: (33)
 
skinnies's Avatar
 
Join Date: Jul 2004
Location: KS
Posts: 2,431
Likes: 0
Received 4 Likes on 4 Posts

Default

Crazy, I broke a stock replacement cloyes on my 383 about 4 years ago, ended up bending 6 valves. I only recommend running the pro gear chains now.
Old 06-11-2009, 07:12 AM
  #10  
11 Second Club
iTrader: (88)
 
the_merv's Avatar
 
Join Date: Mar 2006
Location: The Beach...
Posts: 19,250
Received 58 Likes on 51 Posts

Default

I used the LT4 Timing Kit on my build and it worked fine for me.
Old 06-11-2009, 08:17 AM
  #11  
Launching!
 
ALEXZ28's Avatar
 
Join Date: Feb 2009
Posts: 201
Likes: 0
Received 0 Likes on 0 Posts
Default

i got mine at advance for 100.00 when i did my rebuild, thats the reason i changed my timing chain.
Old 06-12-2009, 03:46 AM
  #12  
Launching!
Thread Starter
 
DarkKnightRider's Avatar
 
Join Date: May 2008
Location: So-Cal
Posts: 223
Likes: 0
Received 0 Likes on 0 Posts
Default

Well let me ask this. For a regular timing chain. What brand would you guys recommend? I don't want to have to mod my motor anymore for this ****.
Old 06-12-2009, 05:01 AM
  #13  
TECH Senior Member
iTrader: (36)
 
ss.slp.ls1's Avatar
 
Join Date: Jan 2008
Location: Orange County, CA
Posts: 8,188
Received 26 Likes on 24 Posts

Default

Originally Posted by DarkKnightRider
Well let me ask this. For a regular timing chain. What brand would you guys recommend? I don't want to have to mod my motor anymore for this ****.
For a replacement timing set, the OEM timing set should do you fine.
Old 06-12-2009, 08:50 AM
  #14  
11 Second Club
iTrader: (88)
 
the_merv's Avatar
 
Join Date: Mar 2006
Location: The Beach...
Posts: 19,250
Received 58 Likes on 51 Posts

Default

I'd still prefer a Roller Chain..that's just me.
Old 06-12-2009, 04:51 PM
  #15  
Launching!
Thread Starter
 
DarkKnightRider's Avatar
 
Join Date: May 2008
Location: So-Cal
Posts: 223
Likes: 0
Received 0 Likes on 0 Posts
Default

is there such thing as a single roller timing chain? is that the stock replacement? cuz i do NOT want this happening agian.
Old 06-12-2009, 05:32 PM
  #16  
11 Second Club
iTrader: (88)
 
the_merv's Avatar
 
Join Date: Mar 2006
Location: The Beach...
Posts: 19,250
Received 58 Likes on 51 Posts

Default

Yea, the LT4 Timing Kit.
Old 06-12-2009, 05:33 PM
  #17  
Village Troll
iTrader: (2)
 
SS RRR's Avatar
 
Join Date: Oct 2002
Location: Jackstandican
Posts: 11,003
Received 517 Likes on 373 Posts

Default

Originally Posted by DarkKnightRider
is there such thing as a single roller timing chain? is that the stock replacement? cuz i do NOT want this happening agian.
The normal LT4 chain (not the extreme duty) is a single roller. I used one and it had an incredible amount of slop in it.
Old 06-12-2009, 06:08 PM
  #18  
11 Second Club
iTrader: (88)
 
the_merv's Avatar
 
Join Date: Mar 2006
Location: The Beach...
Posts: 19,250
Received 58 Likes on 51 Posts

Default

I had the extreme duty one..it was a single roller.
Old 06-12-2009, 07:24 PM
  #19  
11 Second Club
iTrader: (6)
 
speed_demon24's Avatar
 
Join Date: Dec 2001
Location: Ocala, FL
Posts: 4,609
Likes: 0
Received 2 Likes on 2 Posts

Default

Originally Posted by SS RRR
The normal LT4 chain (not the extreme duty) is a single roller. I used one and it had an incredible amount of slop in it.
My LT4 ED chain has a decent amount of slop in it too after 20k miles. I'm guessing any "gm" chain will be similar.

And as previously stated in this thread make sure that you find out what caused the chain to snap and make sure the engine isn't damaged.
Old 06-12-2009, 07:27 PM
  #20  
Village Troll
iTrader: (2)
 
SS RRR's Avatar
 
Join Date: Oct 2002
Location: Jackstandican
Posts: 11,003
Received 517 Likes on 373 Posts

Default

Originally Posted by the_merv
I had the extreme duty one..it was a single roller.
It is for clarity sake. There is both a LT4 and a LT4 ED. The regular LT4 chain's links are about the size of a bicycle chain...

Originally Posted by speed_demon24
My LT4 ED chain has a decent amount of slop in it too after 20k miles. I'm guessing any "gm" chain will be similar.

And as previously stated in this thread make sure that you find out what caused the chain to snap and make sure the engine isn't damaged.
The remedy was the sooper dooper oversized crank gear which then yielded about .020 clearance between the cam and crank gear...

Thread Tools
Search this Thread
Quick Reply: Big timing chain problem



All times are GMT -5. The time now is 04:16 PM.